public enum Move
{
	LEFT, RIGHT, UP, DOWN, WAIT, ABORT, SHAVE;
	public Move opposite()
	{
		switch (this)
		{
		case LEFT:
			return RIGHT;
		case RIGHT:
			return LEFT;
		case UP:
			return DOWN;
		case DOWN:
			return UP;
		default:
			return this;
		}
	}
}
